Hey thanks! :D
How do I use it with Showcase? I can't seem to figure it out at all.
May be a bit late, but here it goes.As far as I know, there is no way to directly edit the save from Showcase, as it uses a specific checksum which first needs to be cracked.However, by using a USB Gecko and Gecko OS, you can pretty much upload the microgames to the memory, overwriting an existing microgame (be it user created or built-in), so that you can easily transfer it to DS. If you want, I can give a short explanation, though it pretty much is self-explanatory.